For sale, Heights acme screw drive and Dayton 6Z403 gear motor new in box, purchased 2001. This is the newer 1 1/4 inch size that will typically lift 64 feet of tower. It comes with hardware to retro
I have a 259B that was given to me. The reason was that it does not give the sign of the impedance. The circuits (they were not antennas) the original owners were measuring were such that the sign wa
I have about 15 miles of hookup wire rolled out on the ground. What you have is similar but not insulated. Someday, it may corrode away, but that's hard to predict. It will handle full legal power. I
One of the least accurate uses of any Gerry Burke (of NEC fame) told me that some people had tried to measure ground characteristics by running transmission lines at low heights above the ground. I d
Yes, Gerry said the measurements were done with the "Owl Kit" Rick N6RK _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
I'm looking for names of trucking companies that would be good for shipping a tower within California. Rick N6RK _______________________________________________ See: http://www.mscomputer.com for "Se
You're right. That's why the tower will be in a crate, with the forks points underneath. Rick _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Tower
It's not. It's rated 200 watts. Rick N6RK _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Cal
"They laughed at Galileo, they laughed at Einstein. But they also laughed at Bozo the Clown." _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towe
You've explained the electrical design well. Now the mechanical aspect: How do you keep the large hat from breaking off when it hooks low hanging tree branches? I'm afraid to use anything but a CB wh
I have 80 and 40 meter concentric 7-hex arrays. The 80 meter verticals have insulators at the midpoint with latching vacuum relays across them. I have to open up the relays on the 80 meter verticals
If I understand what you are proposing, the 160 elements would be grounded halfwaves when operating on 80. They would still distort the pattern (I modeled this on EZNEC). (The distortion is less tha
Note that the article talks about the Kintronic being 1/5 the height of a monopole, but in the actual tests, it was about 1/3 the height of the monopole. Basically, it's just a top hat loaded cage ve
I am doing a similar thing with my 7-hex arrays. The 80 meter array will also be used on 160. The spacing will be 3/8 wl on 80 and 3/16 wl on 160. The verticals will be 90 ft top loaded verticals on
When I built my first 7 hex array, I measured the impedances and compared them with EZNEC. They were considerably different. Fortunately, the phasing network has one adjustable coil and one adjustabl
The real issue is probably: Is the MA550 strong enough for the Yagi when the wind blows? I just bought a 2 element SteppIR for my MA-550. I also have a 4 element SteppIR at another QTH on a lattice t
I did a bunch of A/B testing of inverted vee's at 30 and 60 ft on the same mast. The increase in height helped on the average of a few dB on 20 (not a huge difference) but helped substantially as th
I looked into this and discussed it will Mike at SteppIR. The SteppIR can possibly work on 30 meters, only because the legal power limit is 200W. Even at this power, the voltage developed is 2 or 3 t
It might be helpful to point out that cell phones right next to your head routinely operate at .75 watts, and on a frequency with much higher absorption than HF. Then there are electric blankets. Bot